Chuck.



Witwen/mo,

M nw

W. G. SANBORN.

CHUCK.

APPLIoATIoN FILED APR. 3, 1908.

Patented sept.14,1909. l

@uvam/Cola gn @whom/1mg @drm w WILLIAM G. SANBORN, OF ROCKFORD,ILLINOIS.

CHUCK.

Specication of Letters Patent. Patented Spt. 14, lgf.

Application filed April 3, 1908. Serial No. 425,040.

To all whom 'it may concern:

Be it known that I, VILLIAM G. SANBORN, a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in Chucks, of whichthe following is a specification.

The obj ect of this invention is to construct a chuck which is providedwith means for adjusting the jaws to different sized tools, and anothermeans for clamping the tool in the jaws.

In the accompanying drawings, Figure 1 is a side elevation of myimproved chuck. Fig. 2 is a transverse section on dotted line a a Fig.8. Fig. 3 is a longitudinal section on dotted line Z) Z) Fig. 2. Fig. lis a longitudinal section on dotted line o c Fig. 2. Fig. 5 is aperspective view of the wedge. Fig. 6 is a perspective view of theblock, partly in section.

The body 1 has one end rovided with eX- ternal screw-threads 2. shank orother connection may be made with the other end of the body, or a shankmay be made integral with the head. The end of the body having thescrew-threads 2, is formed with a lengthwise extending bore 3, and atransverse cylindrical opening t is formed through the body 1 near theend of the bore 3. Within the bore 3 is located a cylindrical block 5which is provided with a lengthwise extending transverse slot 6, andbottom 7, of which extends diagonally to the length of the block formingan inclined surface.

A wedge is cylindrical in cross section, and its ends 8, arev of a sizeto move endwise freely in the transverse opening 4: in the body. Thiswedge has its center portion flattened on two sides, leaving the section9 of a thickness to closely lit within the slot 6 of the block 5. Thiswedge is tapering having one face 10 inclined to the direction of thelength of the wedge and is located in Contact with the inclined surface7 of the block. Each of the jaws 11 having an inclined surface 14 areformed integral with the end 12. The end 12 of the jaws 11 is locatedwithin the bore 3 of the head 1, and is seated against the solid end ofthe block 5. A ferrule 13 is internally screw-threaded and adapted toturn in connection with the screw-threads 2 of the head 1. The internalsurfaces 15 of the free end of this ferrule are fitted to the inclinedsurfaces of the jaws 11.

After the wedge is placed in the opening 1l, the block placed in thebore 8 in the head, and the end 12 of the jaws placed in the bore 3against the end of the block 5, the ferrule is turned in connection withthe screw-threaded end of the head 1. The tool, for instance a drill, islocated between the jaws, and the ferrule 13 is turned against theinclined surfaces 141 of the aws, thereby closing the jaws in contactwith the tool. The wedge is then driven in its lengthwise directionwhich will cause the inclined surface 10 of the wedge to contact withthe inclined surface 7 of the block 5, and force the inclined surfaces14 of the jaws along the internal inclined surfaces 15 of the ferrule,thereby increasing the holding action of the jaws in connection with thetool. In driving the wedge in the reverse direction, the pressure'vofthe jaws upon the tool will be relieved, and the tool may be removed. The block has a lengthwise slot 16 within which is located a pin 17,which is supported by the body 1, thereby permitting a lengthwisemovement to the block, but preventing it becoming disengaged from thebody when the jaws are removed, and thereby retaining the block andwedge in the body. rlhe ferrule 13 is adjusted in connection with thebody to close the jaws looselyaround the tool when different sized toolsare used, and the holding force of the jaws against the tool isincreased by the act-ion of the wedge.

I claim as my invention.

A chuck comprising a body having a lengthwise bore and a transversecylindrical opening, jaws supported by the body and located in thelengthwise bore and capable of lengthwise movement, a block located inthe lengthwise bore of the body and capable of lengthwise movementtherein and having one end slotted, the bottom of the slot beinginclined and the unslotted end of the block contacting with the jaws, awedge located and movable in the transverse opening and exerting alengthwise movement of the block, said wedge having cylindrical ends myhand in presence of two subscribing witnesses. Y

and three flat surfaces, oneY of the Surfaces being` `tapering in thelengthwise direction of the wedge and contacting with the inclinedbottoni of the slot, the other two flat 5 surfaces located in the slotin the end of the i itnessesz WILLIAMY G. SANBORN.

block. A. o. Emmi.

In testimony whereof I have hereunto set E. D. E. N. BEI-mL.

